Electric-arc lamp.



N0. 635,8l9. Patented Oct. 3|, 1899.

H. 0. SWOBODA.

ELECTRIC ARC LAMP.

(Application filed Aug. 29, 1898.) (No Modal.) 2 Shanta-Shut I.

? V '-Z0 14A J Z6 .24 l

WlTNESSESi INVENTOR f. U W

& 1/7 ATTORNEY No. 635,819. Patented on. 31,1899.

H. 0. SWOBODA.

ELECTRIC ARC LAMP.

(Application filed Aug. 29, 1898.) i I (No Model.) 2 Sheets8heet 2,

vJ2 6 16 a J5 INVENTOR /7 4 7, J ATTORNEY UNITED STATES PATENT OEEIcE.

HANS OTTO SWVOBODA, OF NEW YORK, N. Y., ASSIGNOR TO THE GENERAL INOANDESOENT ARO LIGHT COMPANY, OF NEN YORK.

ELECTRIC-ARC LAMP.

SPECIFICATION forming part of Letters Patent No. 635,819, dated October 31, 1899.

Application filed August 29, 1898. Serial No- 689,806. (No model.)

To on whom, it may concern: which must necessarily experience the same Be it known that I, HANS OTTO SWOBODA, vibrations are insulated completely from the a subject of the Emperor of Germany, residother portions of the lamp so far as the transing at New York city, county and State of mission of said vibrations is concerned. 55 New York, have invented new and useful Im- The preferred form of my invention is illusprovements in Electric-Arc Lamps, of which trated in the accompanying sheets of drawthe following is a specification. ings, in which My invention relates generally to an im- Figure l is a side elevation of a feed mechproved method of mounting electromagnets anism, showing a portion of the supporting- 60 IO which are subjected to the action of alternatframe of the lamp and my improved method ing currents and finds its most important apof mounting the magnets. Fig. 2 is a front plication in the mounting of the feed-magelevation of the same. Fig. 3 is a section on nets of an electric-arc lamp designed to be the plane of Fig. 1, and Fig. 4 is a section on operated by alternating currents. As is well the plane of Fig. 2, said sectional views be- 65 known, the rapid reversals of action in the ing designed to bring out clearly the attachalternating current used for operating such ment of the core or armature of the feed-maglamps cause the feed-magnets to vibrate so not to the feed mechanism. Fig. 5 is a derapidly that a humming or chattering noise tail showing a modified form of a spring-plate is produced. If the magnet or magnets are attachment. Figs. 6 and 7 illustrate modi- 7o rigidly mounted on the supporting-frame of fied forms of armature-connecting springs.

the lamp or on a base rigidly attached to said Throughout the drawings like reference-figframe, the vibrations of the magnet are transures refer to like parts. mitted to the entire lamp and'the sound is 1 represents the lower supporting-plate of greatly magnified, so as to become highly obthe lamp. 7 5 2 5 jectionable, especially when the lamp is used 2 represents the upper supporting-plate.

for indoor illumination. Moreover, the vi- 3 3 represent the feed-magnet, which, as

brations thus transmitted to the lamp intershown, consists of two solenoids, but which fere with the steadiness of the light and the obviously might be of any form.

smoothness of the feeding action. I over- 4 4, &c., represent the studs, which form 8o come this difficulty by mounting said feedthe inclosing frame of the magnet.

magnet on a flexible base, and preferably in- 5 is a flexible spring-plate, to which the terpose sound deadening material at the magnet is attached by the studs 4 or otherpoint of attachment to the supporting-frame wise, preferably having a curved portion 6 and at every point of possible contact beand a reversed portion 7, which latter is at- 8 5 3 5 tween the magnet or its projections and said tached to the plate 2 by any convenient means, supporting-frame. Obviously any kind of a such as the screw-bolts 8 8, passing through feeding device may be employed to cause the the lug 9 on plate 2 and having the nuts 10 10. feeding of the carbons under the control of 11 and 12 represent interposed layers of said magnet; butlpreferably employ aclutch sound-deadening material which are located 0 of the general description illustrated and debetween the flexible plate and the supportscribed in application, Serial No. 667,672, filed ing-plate 2 and nut 10. Sleeves or thimbles February 17, 1898, by Sigmund Bergmann. 13 13 of the same material may surround bolts Inasmuch as the movable core or armature of 8 8. Various kinds of material may be used the solenoid-magnet commonly used becomes for this purpose of deadening the sound and 95 rigidly connected with said magnet under the other vibrationssuch as asbestos, indurated action of the magnetism when the current is fiber, paper, &c., or other non-resonant mapassed through the solenoid, it also becomes terial. In case the coils of the magnet and necessary to interpose a vibration-deadening their connections are not insulated completely connection between said armature and the from the spool or other support the soundmo other portions of the feed mechanism of the deadening material should also be an eleclamp, and thus the feed-magnets and all parts trically-insulating material; but it is obvious that nearly every form of such material, such as mentioned above, is also an electricallyinsulating material.

In order to prevent too extensive vibrations of the magnet and to prevent sagging of the same beyond a certain extent, stops 14c and 15 or other projections are extended to within a short distance of the plates 1 and 2, and in order to deaden and prevent the creation of noise and the transmission of vibrations to the supporting-frame similar pieces of sounddeadening material 16 and 17 are located at all points of possible contact.

The magnets 3 3 have the U-shaped armature or double core 23, which is supported by the spring 26, attached to its middle portion by the preferably hinged joint 29. The upper end of this spring 26 is attached to the depending rod 28, mounted in the cross-piece 21, to one end of which is connected the dashpot 24:, while the other end is connected to the clutch 19 by the rods 3 30 or other equivalent device.

The mechanism above described is guided by the rod 27, fastened to the plate 2 and having a telescoping joint with a prolongation of the part 28. p

A m odifled form of supporting spring-plate 5 is shown in .Fig. 5, the bent portion (3 of said spring-plate being attached directly to the side of the lug 9 by means of a screw 8, with the interposition of sound -deadening material in the same manner as described with reference to Figs. 1 and 2.

Figs. 6 and 7 illustrate modified forms of the springs 26 and 26, and it is evident that still other forms of spring might be employed, the point to be kept in view being only to provide a spring which will have sufficient flexibility to prevent the transmission of vibrations, while at the same time it shall have sufficient stiffness to render the clutch-open ating mechanism responsive to movements of the armature 23.

The other parts of the lamp shown in the drawings for clearness are the carbon-carrier l8, clutch-supporting spring 20, lamp side rods 2st 24-, and clutch-tripping lugs 25 25.

The mode of operation of my invention is clear from the foregoing. 'Iowever rapidly the feed-magnets may vibrate under the action of the alternating currents, those vibrations will not be transmitted to the lamp, nor will the sounds produced by such vibrations be magnified by communication to and amplification by the metallic lamp structure, as is the case in ordinary lamps.

Evidently various changes could be made in the details of construction shown without departing from the spirit and scope of my invention, so long as the central idea thereofto wit, the interposition of a yielding medium at every point of contact between the magnet and the lamp-frameis retained.

The prime object of my invention, as before stated, is to prevent the transmission of vibrations from the feed-magnets and their armature to the other portion of the lamp, and this is secured by interposing springs or soft non-resonant material at every point of attachment and possible contact between said feed-magnet and armature and the other portions of the lamp. \Vhile every material which will prevent transmission of such vibrations is included in my invention, I shall refer to such material by the expression sound-deadening material, inasmuch as the most noticeable result of such vibrations is the series of sounds, which it is the object of my invention to eliminate from the operation of the lamp.

IIaving therefore described my invention, what I claim as new, and desire to protect by Letters Patent, is

1. In an electric-arc lamp, the combination of the supporting-frame,the feed-magnet, and a horizontally-disposed spring-plate from which said magnet is suspended, substantially as described.

2. In an electric-arc lamp the combination of the supporting-frame, the feed-magnet, the flexible plate on which said magnet is mounted and sound-deadening material interposed between said plate and frame at the point of attachment thereof, substantially as described.

3. In an electric-arc lamp the combination of the supporting-frame having an upper and lower plate, the feed-magnet supported between the same by a flexible mounting, and sound-deadening material located at all points of possible contact between said magnet and said frame-plates, and interposed between the same, substantially as described.

4. In an electric-arc lamp the combination of the supporting-frame,the feednnagnet sup ported thereon by a flexible sound-deadening mounting,and a mass of sound-deadeningmaterial located on said supporting-frame under said magnet at the points of possible contact in case of a sagging of said magnet, substantially as described.

5. In an electric-arc lamp, the combination of the supporting-frame, the feed-magnet, and the horizontally-disposed curved spring-plate suspending the magnet and attached at its curved end to the supporting-frame, substantially as described.

6. In an electric-arc lamp, the combination of the supporting-frame having an upper and lower plate, the feed-magnets supported and suspended between the same by horizontallydisposed flexible mounting and stops extend ing from said magnets to within a short distance of one or more of said plates, substantially as described.

'7. In an electric-arc lamp the combination of the supporting-frame having an upper and lower plate, the feed-magnet supported between the same by a flexible mounting, and stops extending from said magnet to Within a short distance of one or more of said plates, together with sound-deadening material located at all possible points of contact between said stops and said plates, substantially as described.

8. In an electric-arc lamp, the combination of the supporting-frame, the feed-magnet,an d a horizontally-disposed flexible mounting and suspending device for the feed-magnet, the clutch mechanism,tl1e feed-magnet armature, and a flexible connection between the armature and the clutch mechanism, substantially as described.

9. In an electric lamp, the combination of the supporting-frame, the feed-magnet, provided with an armature having a movement in the longitudinal axis of the lamp, and a horizontally-disposed spring-plate connected I 5 at one end to the supporting-frame and at the other end to said. magnet, substantially as described.

In testimony whereof I afiix my signature in the presence'of two Witnesses.

HANS OTTO SlVOBODA. Witnesses:

E. LARENS, F. D. NEWTON. 

